Device for feeding back power
a technology of power supply and feedback device, which is applied in the direction of fixed transformers, wind energy generation, transformers, etc., can solve the problems of increasing the volume and cost of the generator, the inability to provide stable output voltage and current, and the greatly reduced cost and volume of the converter, so as to improve the waveform coefficient of current, increase the power factor and the utilization of the device, and reduce the power factor
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embodiment 1
[0038]FIG. 5 illustrates the principle of embodiment 1 of the power feedback device according to the present invention. As shown in FIG. 5, the power feedback device includes: an AC input power source 11, a plurality of power converting units 12 and an isolating transformer 13; wherein the AC input power source 11 is three-phase or multi-phase AC or three-phase or multi-phase AC in which the output terminal is connected in series with an inductor, for generating power; the input terminals of the a plurality of power converting units 12 are respectively connected with two terminals of the AC input power source 11, for power converting the two phases of AC generated by the AC input power source 11 respectively; the primary side of the isolating transformer 13 is a three-phase winding and connected with a power network, and the secondary side of the isolating transformer 13 is a multi-path three-phase winding and connected with the output terminals of the a plurality of power convertin...
embodiment 2
[0041]FIG. 9 illustrates the principle of embodiment 2 of the power feedback device according to the present invention. As shown in FIG. 9, the power feedback device includes: an AC input power source 11, a plurality of power converting units 12, and an isolating transformer 13; and the device may further include: at least one Pulse Width Modulation (short for PWM hereinafter) three-phase inverter bridge circuit 14 consisting of a filtering capacitor and a fully controlled power semiconductor device, the output terminal of the PWM three-phase inverter bridge circuit being connected in series with the inductor and then being connected with the three-phase winding of the secondary side of the isolating transformer 13, or being connected with the output terminals of the power converting units 12, or being connected with the output terminals of the power converting units 12 via an isolating capacitor, or being connected with the three-phase winding of the secondary side of the isolating...
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